1. Lacking brilliance or vitality
   "a dull lacklustre life"
   - lackluster [US], lusterless [N. Amer], lustreless [Brit, Cdn] 
2. Lacking lustre or shine
   "staring with lacklustre eyes"
   - lackluster [US], lusterless [N. Amer], lustreless [Brit, Cdn]

See also: dull, hebetudinous

• mun
• munch
• Munchausen
• Munchausen syndrome
• Munchausen's syndrome
• Munchener
• muncher
• Munchhausen
• munchies
• munchkin
• Muncie
• Munda
• Munda-Mon-Khmer
• mundane
• mundanely
• mundaneness
• mundanity
• mundungus
• mung
• mung bean
• mungo
• Mungo Park
• Munich
• Munich beer
• municipal